Staatsspoorwegen 4-4-0 Locomotives in Indonesia

Class Details by Steve Llanso of Sweat House Media

Class B53 (Locobase 4721)

Data from []; and E Lassueur, "Recent Locomotives for the Dutch Indies Railways," Locomotive Magazine, Volume XXVIII [28] (14 October 1922), pp. 299-302.

See Indra Krishnamurti at [] for building dates and numbers both of predecessor railways and the Indonesian State Railways. Hartmann delivered 7, Werkspoor 2.

Lassueur explained that the thirty-five two-cylinder compound Eight-wheelers procured from Hannover (29) and Saxon of Chemnitz (6) had served the railways well, reaching 80 kph (50 mph) and developing 500 hp. To meet increasing demand, however, the railways turned to a superheated, simple-expansion variant that used piston valves to admit steam to the cylinders.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID4721
Number in Class
Road Numbers651-661/B5301-5309
Number Built
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)20.28 / 6.18
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)37.57 / 11.45
Axle Loading (Maximum Weight per Axle) (lbs / kg)22,267 / 10,100
Weight on Drivers (lbs / kg)44,533 / 20,200
Engine Weight (lbs / kg)76,280 / 34,600
Tender Loaded Weight (lbs / kg)39,904 / 18,100
Total Engine and Tender Weight (lbs / kg)116,184 / 52,700
Tender Water Capacity (gals / ML)2376 / 9
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 3.30 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)37 / 18.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)59.20 / 1504
Boiler Pressure (psi / kPa)174 / 12
High Pressure Cylinders (dia x stroke) (in / mm)14.96" x 23.62" / 380x600
Tractive Effort (lbs / kg)13,207 / 5990.60
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.37
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)14.21 / 1.32
Evaporative Heating Surface (sq ft / m2)876 / 81.40
Superheating Surface (sq ft / m2)215 / 20
Combined Heating Surface (sq ft / m2)1091 / 101.40
Evaporative Heating Surface/Cylinder Volume182.30
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2473
Same as above plus superheater percentage2967
Same as above but substitute firebox area for grate area
Power L1
Power MT

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